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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/certificate_dialogs.h"
#include <algorithm>
#include <vector>
#include "base/base64.h"
#include "base/bind.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/ui/chrome_select_file_policy.h"
#include "chrome/common/net/x509_certificate_model.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/filename_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/shell_dialogs/select_file_dialog.h"
#include "url/gurl.h"
using content::BrowserThread;
using content::WebContents;
namespace {
void WriterCallback(const base::FilePath& path, const std::string& data) {
int bytes_written = base::WriteFile(path, data.data(), data.size());
if (bytes_written != static_cast<ssize_t>(data.size())) {
LOG(ERROR) << "Writing " << path.value() << " ("
<< data.size() << "B) returned " << bytes_written;
}
}
void WriteFileOnFileThread(const base::FilePath& path,
const std::string& data) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE, base::Bind(&WriterCallback, path, data));
}
std::string WrapAt64(const std::string &str) {
std::string result;
for (size_t i = 0; i < str.size(); i += 64) {
result.append(str, i, 64); // Append clamps the len arg internally.
result.append("\r\n");
}
return result;
}
std::string GetBase64String(net::X509Certificate::OSCertHandle cert) {
std::string der_cert;
if (!net::X509Certificate::GetDEREncoded(cert, &der_cert))
return std::string();
std::string base64;
base::Base64Encode(der_cert, &base64);
return "-----BEGIN CERTIFICATE-----\r\n" +
WrapAt64(base64) +
"-----END CERTIFICATE-----\r\n";
}
////////////////////////////////////////////////////////////////////////////////
// General utility functions.
class Exporter : public ui::SelectFileDialog::Listener {
public:
Exporter(WebContents* web_contents,
gfx::NativeWindow parent,
net::X509Certificate::OSCertHandles::iterator certs_begin,
net::X509Certificate::OSCertHandles::iterator certs_end);
~Exporter() override;
// SelectFileDialog::Listener implemenation.
void FileSelected(const base::FilePath& path,
int index,
void* params) override;
void FileSelectionCanceled(void* params) override;
private:
scoped_refptr<ui::SelectFileDialog> select_file_dialog_;
// The certificate hierarchy (leaf cert first).
net::X509Certificate::OSCertHandles cert_chain_list_;
};
Exporter::Exporter(WebContents* web_contents,
gfx::NativeWindow parent,
net::X509Certificate::OSCertHandles::iterator certs_begin,
net::X509Certificate::OSCertHandles::iterator certs_end)
: select_file_dialog_(ui::SelectFileDialog::Create(
this,
new ChromeSelectFilePolicy(web_contents))) {
DCHECK(certs_begin != certs_end);
for (net::X509Certificate::OSCertHandles::iterator i = certs_begin;
i != certs_end;
++i) {
cert_chain_list_.push_back(net::X509Certificate::DupOSCertHandle(*i));
}
// TODO(mattm): should this default to some directory?
// Maybe SavePackage::GetSaveDirPreference? (Except that it's private.)
std::string cert_title = x509_certificate_model::GetTitle(*certs_begin);
base::FilePath suggested_path =
net::GenerateFileName(GURL::EmptyGURL(), // url
std::string(), // content_disposition
std::string(), // referrer_charset
cert_title, // suggested_name
std::string(), // mime_type
"certificate"); // default_name
ShowCertSelectFileDialog(select_file_dialog_.get(),
ui::SelectFileDialog::SELECT_SAVEAS_FILE,
suggested_path,
parent,
NULL);
}
Exporter::~Exporter() {
// There may be pending file dialogs, we need to tell them that we've gone
// away so they don't try and call back to us.
if (select_file_dialog_.get())
select_file_dialog_->ListenerDestroyed();
std::for_each(cert_chain_list_.begin(),
cert_chain_list_.end(),
&net::X509Certificate::FreeOSCertHandle);
}
void Exporter::FileSelected(const base::FilePath& path, int index,
void* params) {
std::string data;
switch (index) {
case 2:
for (size_t i = 0; i < cert_chain_list_.size(); ++i)
data += GetBase64String(cert_chain_list_[i]);
break;
case 3:
net::X509Certificate::GetDEREncoded(cert_chain_list_[0], &data);
break;
case 4:
data = x509_certificate_model::GetCMSString(cert_chain_list_, 0, 1);
break;
case 5:
data = x509_certificate_model::GetCMSString(
cert_chain_list_, 0, cert_chain_list_.size());
break;
case 1:
default:
data = GetBase64String(cert_chain_list_[0]);
break;
}
if (!data.empty())
WriteFileOnFileThread(path, data);
delete this;
}
void Exporter::FileSelectionCanceled(void* params) {
delete this;
}
} // namespace
void ShowCertSelectFileDialog(ui::SelectFileDialog* select_file_dialog,
ui::SelectFileDialog::Type type,
const base::FilePath& suggested_path,
gfx::NativeWindow parent,
void* params) {
ui::SelectFileDialog::FileTypeInfo file_type_info;
file_type_info.extensions.resize(5);
file_type_info.extensions[0].push_back(FILE_PATH_LITERAL("pem"));
file_type_info.extensions[0].push_back(FILE_PATH_LITERAL("crt"));
file_type_info.extension_description_overrides.push_back(
l10n_util::GetStringUTF16(IDS_CERT_EXPORT_TYPE_BASE64));
file_type_info.extensions[1].push_back(FILE_PATH_LITERAL("pem"));
file_type_info.extensions[1].push_back(FILE_PATH_LITERAL("crt"));
file_type_info.extension_description_overrides.push_back(
l10n_util::GetStringUTF16(IDS_CERT_EXPORT_TYPE_BASE64_CHAIN));
file_type_info.extensions[2].push_back(FILE_PATH_LITERAL("der"));
file_type_info.extension_description_overrides.push_back(
l10n_util::GetStringUTF16(IDS_CERT_EXPORT_TYPE_DER));
file_type_info.extensions[3].push_back(FILE_PATH_LITERAL("p7c"));
file_type_info.extension_description_overrides.push_back(
l10n_util::GetStringUTF16(IDS_CERT_EXPORT_TYPE_PKCS7));
file_type_info.extensions[4].push_back(FILE_PATH_LITERAL("p7c"));
file_type_info.extension_description_overrides.push_back(
l10n_util::GetStringUTF16(IDS_CERT_EXPORT_TYPE_PKCS7_CHAIN));
file_type_info.include_all_files = true;
select_file_dialog->SelectFile(
type, base::string16(),
suggested_path, &file_type_info,
1, // 1-based index for |file_type_info.extensions| to specify default.
FILE_PATH_LITERAL("crt"),
parent, params);
}
void ShowCertExportDialog(WebContents* web_contents,
gfx::NativeWindow parent,
const scoped_refptr<net::X509Certificate>& cert) {
net::X509Certificate::OSCertHandles cert_chain;
cert_chain.push_back(cert->os_cert_handle());
const net::X509Certificate::OSCertHandles& certs =
cert->GetIntermediateCertificates();
cert_chain.insert(cert_chain.end(), certs.begin(), certs.end());
new Exporter(web_contents, parent, cert_chain.begin(), cert_chain.end());
}
void ShowCertExportDialog(
content::WebContents* web_contents,
gfx::NativeWindow parent,
net::X509Certificate::OSCertHandles::iterator certs_begin,
net::X509Certificate::OSCertHandles::iterator certs_end) {
new Exporter(web_contents, parent, certs_begin, certs_end);
}
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